Volume 597, January 2017
|Number of page(s)||11|
|Section||Planets and planetary systems|
|Published online||11 January 2017|
A super-Earth orbiting the nearby M dwarf GJ 536⋆
1 Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain
2 Universidad de La Laguna, Dpto. Astrofísica, 38206 La Laguna, Tenerife, Spain
3 Consejo Superior de Investigaciones Científicas, 28006 Madrid, Spain
4 Observatoire Astronomique de l’Université de Genève, 1290 Versoix, Switzerland
5 Univ. Grenoble Alpes, IPAG, 38000 Grenoble, France
6 CNRS, IPAG, 38000 Grenoble, France
7 Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal
8 Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua Campo Alegre, 4169-007 Porto, Portugal
Received: 11 July 2016
Accepted: 5 November 2016
We report the discovery of a super-Earth orbiting the star GJ 536 based on the analysis of the radial-velocity time series from the HARPS and HARPS-N spectrographs. GJ 536 b is a planet with a minimum mass Msini of 5.36 ± 0.69 M⊕; it has an orbital period of 8.7076 ± 0.0025 d at a distance of 0.066610(13) AU, and an orbit that is consistent with circular. The host star is the moderately quiet M1 V star GJ 536, located at 10 pc from the Sun. We find the presence of a second signal at 43 d that we relate to stellar rotation after analysing the time series of Ca II H&K and Hα spectroscopic indicators and photometric data from the ASAS archive. We find no evidence linking the short period signal to any activity proxy. We also tentatively derived a stellar magnetic cycle of less than 3 yr.
Key words: techniques: radial velocities / stars: rotation / planets and satellites: terrestrial planets / stars: individual: GJ 536 / stars: activity / planets and satellites: general
The data used in this paper (Table A.1) are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (22.214.171.124) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/597/A108
© ESO, 2017
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